It depends on who you face in the arena, but if there are a lot of DR teams you’ll need a fast GMY to survive. Specifically, faster than your opponents’ DR. You have to get tenacity up on your whole team before DR uses mass shock or you’re dead in the water. I run DR in the arena, and I specifically target Padme teams because they’re so easy to take out. Often times even a fast Padme is dead before she can even take a turn, after which the team falls apart. The only way they have any chance really is if their GMY can outspeed my DR.